the outcome of tomorrow's debate this denver could help decide the election. but cbs 5 political reporter grace lee says neither side wants to set the bar too high. >> reporter: the first of the three presidential debates is considered by most pundits to be the most important because it really sets the tone. and for once, both the president and the republican nominee actually agree on something. they are both trying to lower expectations. the stage is being set at the university of denver. the focus for the presidential candidates tomorrow evening will be on domestic policies with a heavy emphasis on the economy. both sides are already spinning. >> while president obama's people are saying, hey, i have had no chance to prepare anything, mitt romney's people are saying, hey, president obama is the best debater ever and i have never been in a presidential debate. >> reporter: both sides are off the campaign trail today preparing for the debate. mitt romney was spotted tacking with his debate partner senator rob portman. this picture has been a hit on political b